/* ===== RESET & VARIABLES ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-bg: #fafafa;
  --color-white: #ffffff;
  --color-dark: #1a1a2e;
  --color-dark-secondary: #16213e;
  --color-accent: #4361ee;
  --color-accent-hover: #3a56d4;
  --color-accent-light: #eef1ff;
  --color-gray-50: #f8f9fa;
  --color-gray-100: #f1f3f5;
  --color-gray-200: #e9ecef;
  --color-gray-300: #dee2e6;
  --color-gray-400: #ced4da;
  --color-gray-500: #adb5bd;
  --color-gray-600: #868e96;
  --color-gray-700: #495057;
  --color-gray-800: #343a40;
  --color-text: #2b2d42;
  --color-text-light: #6c757d;
  --color-success: #2dc653;
  --color-border: #e9ecef;
  --font-primary: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.08);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
}

ul { list-style: none; }
img, svg { max-width: 100%; }

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-dark);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.2rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); letter-spacing: -0.02em; }
h3 { font-size: 1.15rem; }

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section-title {
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-light);
  max-width: 560px;
  margin: 0 auto 48px;
  font-weight: 400;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  font-family: var(--font-primary);
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(67, 97, 238, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
}

.btn-outline:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-white {
  background: var(--color-white);
  color: var(--color-accent);
}

.btn-white:hover {
  background: var(--color-gray-50);
  transform: translateY(-1px);
}

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(250, 250, 250, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

.header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
}

.logo-slogan {
  font-size: 7.5px;
  font-weight: 500;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: var(--color-gray-500);
  white-space: nowrap;
}

.footer-slogan {
  color: var(--color-gray-500);
}

.header-logo {
  height: 44px;
  width: auto;
  object-fit: contain;
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav a {
  font-size: 0.9rem;
  font-weight: 450;
  color: var(--color-gray-700);
  transition: var(--transition);
}

.nav a:hover {
  color: var(--color-accent);
}

.nav .btn {
  padding: 10px 22px;
  font-size: 0.85rem;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== HERO ===== */
.hero {
  padding: 140px 0 100px;
  text-align: center;
  background: linear-gradient(180deg, var(--color-white) 0%, var(--color-bg) 100%);
}

.hero h1 {
  margin-bottom: 20px;
}

.hero h1 span {
  color: var(--color-accent);
}

.hero p {
  font-size: 1.15rem;
  color: var(--color-text-light);
  max-width: 520px;
  margin: 0 auto 36px;
  font-weight: 400;
}

.hero-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 48px;
  padding: 8px 16px;
  background: var(--color-accent-light);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--color-accent);
  font-weight: 500;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ===== FEATURES ===== */
.features {
  padding: 100px 0;
}

.features .section-label,
.features .section-title,
.features .section-subtitle {
  text-align: center;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 32px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.feature-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-light);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  font-size: 1.3rem;
}

.feature-card h3 {
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ===== HOW IT WORKS ===== */
.how-it-works {
  padding: 100px 0;
  background: var(--color-white);
}

.how-it-works .section-label,
.how-it-works .section-title,
.how-it-works .section-subtitle {
  text-align: center;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  position: relative;
}

.steps::before {
  content: '';
  position: absolute;
  top: 36px;
  left: 15%;
  right: 15%;
  height: 2px;
  background: var(--color-border);
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: 50%;
  font-size: 1.5rem;
  font-weight: 600;
  position: relative;
  z-index: 1;
}

.step h3 {
  margin-bottom: 8px;
}

.step p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  max-width: 260px;
  margin: 0 auto;
}

/* ===== PRICING ===== */
.pricing {
  padding: 100px 0;
}

.pricing .section-label,
.pricing .section-title,
.pricing .section-subtitle {
  text-align: center;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}

.pricing-card {
  padding: 36px 32px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: var(--transition);
  position: relative;
}

.pricing-card.featured {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
  transform: scale(1.03);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent);
  color: var(--color-white);
  padding: 4px 16px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.pricing-card .price {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 4px;
}

.pricing-card .price span {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--color-text-light);
}

.pricing-card .price-desc {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--color-gray-700);
}

.pricing-features li .check {
  color: var(--color-success);
  font-weight: bold;
  font-size: 1rem;
}

.pricing-card .btn {
  width: 100%;
  justify-content: center;
}

/* ===== TESTIMONIALS ===== */
.testimonials {
  padding: 100px 0;
  background: var(--color-white);
}

.testimonials .section-label,
.testimonials .section-title,
.testimonials .section-subtitle {
  text-align: center;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  padding: 32px;
  background: var(--color-gray-50);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.testimonial-card .stars {
  color: #f5a623;
  font-size: 0.9rem;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.testimonial-card blockquote {
  font-size: 0.95rem;
  color: var(--color-gray-700);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: var(--color-accent);
  font-size: 0.85rem;
}

.testimonial-info strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
}

.testimonial-info span {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

/* ===== CTA / CONTACT ===== */
.contact {
  padding: 100px 0;
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-info .section-label {
  text-align: left;
}

.contact-info .section-title {
  text-align: left;
}

.contact-info > p {
  font-size: 1.05rem;
  color: var(--color-text-light);
  margin-bottom: 32px;
}

.contact-channels {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-channel {
  display: flex;
  align-items: center;
  gap: 16px;
}

.contact-channel-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-light);
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-channel-text strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
}

.contact-channel-text span {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.contact-form {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--color-gray-700);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: var(--font-primary);
  color: var(--color-text);
  background: var(--color-bg);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.contact-form .btn {
  width: 100%;
  justify-content: center;
  padding: 14px;
}

.form-success {
  display: none;
  text-align: center;
  padding: 40px 20px;
}

.form-success.show {
  display: block;
}

.form-success .check-icon {
  width: 64px;
  height: 64px;
  background: var(--color-accent-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.8rem;
}

.form-success h3 {
  margin-bottom: 8px;
}

.form-success p {
  color: var(--color-text-light);
  font-size: 0.9rem;
}

/* ===== FOOTER ===== */
.footer {
  padding: 48px 0 24px;
  background: var(--color-dark);
  color: var(--color-gray-400);
}

.footer-content {
  display: flex;
  justify-content: center;
  align-items: center;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-logo {
  height: 36px;
  filter: brightness(1.5) contrast(0.9);
  opacity: 0.9;
}

.footer-links {
  display: flex;
  gap: 28px;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--color-gray-400);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--color-white);
}

.footer-bottom {
  padding-top: 24px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-gray-600);
}

/* ===== ANIMATIONS ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 968px) {
  .features-grid,
  .pricing-grid,
  .testimonials-grid,
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps::before { display: none; }

  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .pricing-card.featured {
    transform: none;
  }
}

@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-110%);
    transition: var(--transition);
  }

  .nav.open {
    transform: translateY(0);
  }

  .menu-toggle {
    display: flex;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero { padding: 120px 0 80px; }

  .features-grid,
  .pricing-grid,
  .testimonials-grid,
  .steps {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}